Very Large Cliques are Easy to Detect.

Alexander E. Andreev Stasys Jukna Very Large Cliques are Easy to Detect. 2006 Complexity of Boolean Functions http://drops.dagstuhl.de/opus/volltexte/2006/609 conf/dagstuhl/2006P6111 db/conf/dagstuhl/P6111.html#AndreevJ06